Permutation-lock



(Model..)

' R. SARLL S & v. c. HOLLAND.

PERMUTATION LOCK.

Patented Apr. 17,1883,

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NQITED STATES ATENT FFIQEQ PERMUTATlON-LOCK.

SPECIFICATION forming part of Letters Patent No. 276,081, dated Apr-i117, 1883,

Application filed July 3, 1882.

To all whom it may concern:

Be it known that we, It. S'ARLLS and V. C. HOLLAND, both citizens of the United States, of Gainesville, in the county ot'Gooke and State of Texas, have invented a new and valuable Improvement in Door and Drawer Locks; and we do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawings, making a part of this specification, and to the letters and figures of reference marked thereon.

Figure l of the drawings is a longitudinal sectional view ofour lock. Fig. 2 is a transverse section of the same. Fig.3 is a vertical section. Fig. 4 is a perspective view of the bolt L. Figs. 5, 6, 7, and 8 are detail views.

This invention has relation to door and drawer locks; and it consists in the construction and novel arrangement of parts, as will be hereinafter fully described and claimed.

In the accompanying drawings, the letter A designates the incasement'of the lock, which may be provided with a bearing for an ordinary spring-bolt, G, operated by the handles 1) through their connecting-stem E. This ordinary catch-bolt is entirely independent of thelocking-bolt which works through the opening a of the case. WVithin the case and attached to its wall in line with the opening a is the tubular hearing or guide I), which is longitudinally slotted at 0. Around the tubular guide, on its outer surface, are the circular grooves or bearings d d (1, arranged in a series. Engaging these circular bearings are the locking-rings e e c, which turn on said bearings and are each formed with an interior notch, g, of equal width to that of the slot 0 of the tubular guide-bearing. Each ring is also provided with an arm spur or projection, h, designed to engage a spur or hearing of the next in succession, as indicated in the drawings. The governing-ring e on the bearing nearest the end of the tubular guide is formed with a cam-recess, 7;, in its face at the point whereits interior notch, g, is located. The depth of this cam-recess is equal to the distance'which the bolt L moves in looking. This bolt is seated in the tubular guide and is slotted longitudinally to receive the locking-arm 022, one end of which is pivoted to the bolt, while the other end projects therefrom, as indicated (Model) atp. On the edge of that portion of the arm which is in the slot of the bolt are formed the teeth t, t, and t, which are respectively designed to engage the locking-rings e, e, and 6 when the arm is held up in looking position by an adjustable hearing; or, if the slot of the tubular guide is on the under side, the arm will be held in locking position by its weight. The bolt is designed to be retracted when unlocked automatically by means of a spring, 8; or a thumb-slide may be arranged to engage it, said slide passing through the case to the outside. The governing-ring is formed with marginal teeth or is provided with a toothed circle, a, to engage the toothed disk '0, which is rigidly secured to the stem a of the graduated knob or handle H. The graduated base I) of this handle is designed to be formed with marginal spurs or ribs 2; of small size, but sufficiently large to be easily distinguished by the finger. The spur or rib which is located at figure 1 of the graduation is larger than the other spurs or ribs, which are respectively arranged in radial relation to the other figures of the base. This construction will enable the person desiring to unlock the door to run the combination in the dark, should it be necessary.

The operation of the lock is as follows: Being unlocked, the bolt L is in the retracted position, being held back by the spring s. The door can then be operated in the usual manner, being held, when closed, by the ordinary spring-bolt. If the lock is arranged on a drawer, no springboltwill be necessary. When the door is closed, in order to lock it the graduated knob is turned, operating the toothed disk e, and the first or governing ring, 6, which will act by its cam-recess to throw out the end of the locking-bolt. By turning the handleH all the rings of the slotted guide can be moved sufficiently to engage the teeth of the locking arm of the bolt; or the bolt can be projected from the inside of the door by turning the disk '1), or a gear-wheel engaging the same.

In order to unlock the fastening it is necessary to cause the notches g of the locking-rings to range into line along the slot of the tubular guide. This is easily accomplished by any one knowing the combination on which the loekis set. The graduated knob is turned first in one direction and then in another until the several numbers of the combination have been brought into position opposite the base-line on the case, and in'this manner the notches g of the rings are brought into alignment, when the bolt'will be retracted by its spring. In order to unlock the door from the inside it is only necessary to release the toothed arm of the bolt from its adjustable hearing or dctent, so that it can be moved entirely within the slot of the bolt, and then the bolt will be retracted.

The combination depends upon the relative arrangement of the toothed governing-rim g e and the graduated base of the handle H, and it can be changed at any time by removing the screw-fastening s, whereby the disk 1) is secured to the stem of the handle and rearranging the governing-ring so that its notch will come into alignment with the slot of the tubular guide upon a diflerent number.

Having described this invention, what we claim, and desire to secure byLetters Patent, 1s-

The combination, with the slotted tubular guide I), the locking-bolt therein, and its pivoted and toothed locking-arm m, of the in- 

